According to experts of the International organization for Standardization (ISO), “blockchain and distributed systems technologies are becoming an important new direction in the development of information technologies; they can be used in many industries to solve a wide range of problems. On the basis of these technologies, it is possible to create new solutions with great potential to accelerate business processes and significantly reduce costs, especially in cases where there is a need for reliable and unchangeable documents within the framework of transactions between individuals or organizations, without the involvement of a trusted third party for this purpose...